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Overview of Installation and Configuration
Planning HP-UX VLANs
Chapter 222
Planning HP-UX VLANs
The following requirements must be satisfied before setting up VLANs in
an HP-UX network:
• In order for both end stations of a VLAN to communicate, both the
end-station LAN cards and the switch ports that are connected to
those LAN cards on a point-to-point link need to be VLAN-tag-aware.
• For VLANs to communicate with each other, an external
VLAN-aware switch or router is required (Figure 2-1). However, it is
not possible to extend a single vlan across a router.
• If a hub is connected to a network of VLANs, every port on the hub
must belong to the same VLAN. Hubs do not have the ability to
provide VLANs to individual ports.
VLAN awareness does not provide any benefit in a shared LAN
environment (using hubs or repeaters). In these shared LAN
environments, all stations see all traffic whether it is VLAN tagged or
not.
Figure 2-1 Communication between VLANS Requires an External Router
Red VLAN
Green VLAN
LAN Card with Two
Router
External
Port A1
Port A2
Port A3
Port A4
VLANs Configured
Port-Based